Sail Away Shrimp Toast

Name: Sail Away Shrimp Toast
Ingredients: 1/2 cup low-sodium soy sauce; 1/4 cup brown sugar; 1 tablespoon rice vinegar; 1 tablespoon cornstarch; 1 liter canola oil, or enough to deep-fry; 4 slices white bread, crust cut removed and cut into 16 triangles; 1 large clove garlic, lightly crushed with the side of a knife blade and quartered; 1 tablespoon peeled chopped fresh ginger root; 1 egg; 1/4 cup heavy cream; 1 tablespoon fish sauce; 2 teaspoons sesame oil; 1 pound rock shrimp; 1/2 cup sesame seeds